photograph of a frog by Kuenen and
Edward Waymouth Reid, published in
Nature,
vol. liii. p. 419, 5 March 1896 Kuenen was the son of the professor of theology
Abraham Kuenen and his wife Wiepkje Muurling. His son
Philip Henry Kuenen was professor of geology. From 1884 to 1889 he studied at the
University of Leiden, where he graduated in 1892. He became a professor in physics in 1895 at
University College, Dundee in
Dundee, Scotland, where he worked until 1907. For most of this period the college was part of the
University of St Andrews. While at Dundee he performed early experiments with
x-rays with the
physiologist Edward Waymouth Reid. In 1907 he was appointed professor of physics at
Leiden University.
Heike Kamerlingh Onnes and Kuenen led the Kamerlingh Onnes Physics Laboratory. On the basis of his scientific work he was elected in 1911 as a member of the
Royal Netherlands Academy of Arts and Sciences (KNAW), and became a member of the
Hollandsche Maatschappij der Wetenschappen in 1915. ==Retrograde condensation ==